CN111845571A - Expansion bracket device for engineering vehicle and using method and application thereof - Google Patents

Abstract

The utility model provides an extension support device and application method and application for engineering vehicle, include the in-connection portion that has with the frame connection of engineering vehicle, have the outer joint portion that is connected with the upper mounting part of engineering vehicle and have support body (1) of installation arch interval, through support body (1), realized the connection with other upper mounting parts of engineering vehicle, realized the functional unit protection installation to engineering vehicle, consequently realized the installation to the spare part of engineering vehicle simultaneously, optimized the spare part installation space of engineering vehicle.

Description

Expansion bracket device for engineering vehicle and using method and application thereof

Technical Field

The invention relates to an expansion bracket device, a using method and application thereof, in particular to an expansion bracket device for an engineering vehicle, a using method and application thereof.

Background

The engineering vehicle refers to various vehicles such as an oil field operation vehicle, a cement mixer truck, an automobile crane and a tractor, and a bracket device is needed to be used for installing various upper parts on the engineering vehicle, so that the bracket device is an important automobile part, and is also a single functional part in the existing bracket device, and an expanded bracket device and a using method and application thereof for the engineering vehicle are not provided, for example: during operation or maintenance, personnel often operate and construct on an upper platform of a chassis, the upper platform surface of a chassis of a medium and heavy truck is higher and can be completed by means of a ladder, the prior art is that an engineering ladder is carried along with a vehicle, the personnel lay down the ladder to realize the operation of loading and unloading the platform when loading the vehicle, along with the development of the technology, the conventional vehicle is that independent loading pedals are fixed at proper positions on the left side and the right side of the chassis of the vehicle, but the left side and the right side of the chassis are often provided with essential chassis accessories such as a urea box, a battery box, a tool box, a fuel tank, a gas storage cylinder and the like, the reserved space for arranging the ladder of the pedals is almost the same, the arranged ladder is narrower, the loading and unloading are inconvenient, and even the ladder can only be carried along with,

the safe boarding ladder is characterized in that a step ladder is arranged on the outer side of a platform and is provided with a boarding auxiliary handrail, which is called as a ladder stand, but the step ladder arranged on the conventional chassis is simple in structure, only a boarding step is used for stepping a frame ladder, and the boarding auxiliary handrail is not arranged, so that the safety and the comfort of people getting on and off are influenced,

in addition, like oil field operation vehicles, automobile cranes and other engineering vehicles with upper platform surfaces, the platform can be widened to the widest within the national standard allowable range for increasing the platform area, any additional equipment cannot exceed the outer edge of the platform, so that the upper vehicle pedals can be arranged to be flush with the outer edge of the platform or even on the inner side of the platform, which undoubtedly brings hidden danger to the safety of people getting on and off the platform,

the technical scheme of the invention is made based on the technical problems, technical features and technical effects in the technical background of the applicant.

Disclosure of Invention

The object of the invention is an expansion bracket device for a working vehicle,

the invention aims to provide a method for using an expansion bracket device for an engineering vehicle,

the invention relates to an expansion bracket device for an engineering vehicle and application of a using method.

In order to overcome the technical defects, the invention aims to provide an expansion bracket device for an engineering vehicle, a using method and application thereof, so that the parts of the engineering vehicle can be simultaneously installed, and the installation space of the parts of the engineering vehicle is optimized.

In order to achieve the purpose, the invention adopts the technical scheme that: an expansion support device for an engineering vehicle comprises an inner connecting part connected with a frame of the engineering vehicle, an outer connecting part connected with an upper part of the engineering vehicle and a support body with an installation arch-shaped interval.

Due to the design of the support body, the support body is connected with other upper parts of the engineering vehicle, and the functional parts of the engineering vehicle are protected and installed, so that the parts of the engineering vehicle are installed at the same time, and the part installation space of the engineering vehicle is optimized.

The invention designs the technical characteristics of integrating the bracket body according to the connection with other upper-mounted components of the engineering vehicle and the protection and installation mode of functional components of the engineering vehicle.

The invention designs that the inner connecting part connected with the frame of the engineering vehicle is arranged to comprise a first lower frame part and a second lower frame part.

The invention designs that an outer connecting part connected with an upper assembly part of a construction vehicle and an installation arch-shaped section are arranged to comprise a first upper frame part and a second upper frame part.

The invention designs that the bracket body further comprises a first beam part, a second beam part, a third beam part and an ear plate part.

The invention designs that the device also comprises a first accessory device which is arranged on the bracket body, and the first accessory device is arranged as a walking board.

The invention designs that the ladder further comprises a second accessory device, the second accessory device is arranged on the support body, and the second accessory device comprises a ladder frame and a grab bar.

The invention designs that the bracket further comprises a third accessory device, the third accessory device is arranged between the second accessory device and the bracket body, and the third accessory device is arranged to comprise a first connecting rod, a second connecting rod, a first follower rod and a second follower rod.

The invention designs that the screw rod type auxiliary device further comprises a fourth auxiliary device, the fourth auxiliary device is arranged between the second auxiliary device and the third auxiliary device, and the fourth auxiliary device is arranged to be tightly pressed against the screw rod.

The invention contemplates that the vehicle further comprises a fifth attachment device disposed between the second and third attachment devices and the bracket body, the fifth attachment device configured as a tension spring.

The invention designs that a second follower rod and a walking board are respectively arranged on a support body, a first connecting rod, a second connecting rod and an extension spring are respectively arranged between the support body and a ladder frame, a first follower rod is arranged between the first connecting rod and the second follower rod, a grab rail is arranged in the second follower rod, and a jacking screw rod is arranged between the second follower rod and the grab rail.

The invention designs that the transverse part of the first lower frame part and the transverse part of the second lower frame part are respectively connected with the lug plate parts, the transverse end of the first upper frame part is connected with the vertical end of the first lower frame part and the transverse end of the first lower frame part is connected with the middle part of the vertical part of the first upper frame part, the transverse end of the second upper frame part is connected with the vertical end of the second lower frame part and the transverse end of the second lower frame part is connected with the middle part of the vertical part of the second upper frame part, the ends of the first transverse beam part are respectively connected with the vertical part of the first upper frame part and the vertical part of the second upper frame part and the ends of the second transverse beam part and the third transverse beam part are respectively connected with the transverse part of the first upper frame part and the transverse part of the second upper frame part, the vertical part of the first upper frame part and the vertical part of the second upper frame part are respectively connected with the first connecting rod and the second connecting rod through the pin shaft, and the corner part of the first upper frame part and the second upper frame part are respectively connected with the first connecting rod and the second The corner parts of the first upper frame part and the second upper frame part are respectively connected with a second follower rod through pin shafts, the transverse parts of the first lower frame part and the second lower frame part are respectively connected with a tension spring, the upper end surface part of the second transverse beam part and the upper end surface part of the third transverse beam part are respectively connected with a walking board, the lug plate part is connected with a battery box, the vertical part of the first lower frame part and the vertical part of the second lower frame part are respectively connected with a frame of an engineering vehicle, the first upper frame part, the second upper frame part, the first lower frame part and the second lower frame part are respectively arranged into L-shaped frames, the cross section of the first upper frame part, the cross section of the second upper frame part, the cross section of the vertical part of the first lower frame part and the cross section of the vertical part of the second lower frame part are respectively arranged into U-shaped, and the U-shaped groove body of the first upper frame part and the U-shaped groove body of the second upper frame part are respectively arranged into U-, The second connecting rod, the second follower rod and the grab bar are connected, the U-shaped groove body of the first lower frame portion is connected with the first upper frame portion, the U-shaped groove body of the second lower frame portion is connected with the second upper frame portion, the first cross beam portion, the second cross beam portion and the third cross beam portion are respectively arranged into a strip-shaped body, and the lug plate portions are arranged into L-shaped sheet-shaped bodies.

The invention designs that the transverse rear end of the first lower frame part and the transverse rear end of the second lower frame part are arranged to be straight bodies, the transverse front end of the first lower frame part and the transverse front end of the second lower frame part are arranged to be tilting bodies, an included angle between the central line of the tilting body and the central line of the straight bodies is set to be 18-24 degrees, and the ratio between the length of the tilting bodies and the length of the straight bodies is set to be 1: 4.8-6.7.

The invention designs that the first connecting rod and the second connecting rod are respectively arranged into a strip-shaped body and are arranged to comprise a first strip plate part, a second strip plate part and a resisting plate part, the upper end part of the inner side surface of the first strip plate part is arranged to be connected with one side surface part of the resisting plate part and the upper end part of the inner side surface of the second strip plate part is arranged to be connected with the other side surface part of the resisting plate part, the end head of the first strip plate part and the end head of the second strip plate part are arranged to be connected with the end head of the resisting plate part in a retraction way and the outer end head of the resisting plate part is arranged to be connected with the ladder frame, one end head of the first strip plate part and one end head of the second strip plate part are respectively arranged to be connected with the bracket body through pin shafts and the other end head of the, the intermediate portion of the first strip plate portion of the first link and the intermediate portion of the second strip plate portion of the first link are respectively provided to be coupled to the first follower lever through a pin shaft and the pin shafts between the first link and the ladder frame are respectively provided to be coupled to the extension spring.

The invention designs a ladder frame which comprises a first side rod part, a second side rod part, a first pedaling rod part and a second pedaling rod part, wherein the lower end of the first side rod part and the lower end of the second side rod part are respectively connected with the end of the second pedaling rod part, the upper end of the first side rod part and the upper end of the second side rod part are respectively connected with the first connecting rod through a pin shaft, the middle part of the first side rod part and the middle part of the second side rod part are respectively connected with the second connecting rod through a pin shaft, the end of the first pedaling rod part is respectively connected with the middle part of the first side rod part and the middle part of the second side rod part and is positioned between the first connecting rod and the first side rod part, the pin shafts positioned between the first connecting rod and the second side rod part are respectively connected with a tension spring, the first side rod part, the second side rod part, the first pedaling rod part and the second side rod part are respectively arranged into a strip-shaped body, the first side rod part, the second side rod part, the first pedal rod part and the second pedal rod part are distributed in a shape like a Chinese character jing.

The invention designs that the walking board is a rectangular sheet body with patterns on the upper end surface and is connected with the bracket body in a covering manner.

The invention provides that the first follower rod is arranged into a strip-shaped body, one end of the first follower rod is arranged to be connected with the first connecting rod through a pin shaft, and the other end of the first follower rod is arranged to be connected with the second follower rod through a pin shaft.

The invention designs that the second follower rod is arranged into an L-shaped tubular body, the vertical part of the second follower rod is arranged to be telescopically connected with the grab rail, the transverse end of the second follower rod is arranged to be connected with the first follower rod through a pin shaft, the corner part of the second follower rod is arranged to be connected with the bracket body through a pin shaft, and the vertical part of the second follower rod is provided with a rectangular hole.

The invention designs that the grab bar comprises a bar part and a hook part, the upper end of the bar part is connected with the hook part, the bar part is connected with the second follower rod in an inserting mode, the side surface of the bar part is connected with the jacking screw in a contact mode, the bar part is a rectangular rod-shaped body, the hook part is an L-shaped rod-shaped body, the end of the transverse part of the hook part is connected with the bar part, and the end surface of the lower end of the transverse part of the hook part is connected with the second follower rod in a contact mode.

The invention designs that the jacking screw is a hexagonal screw and is in threaded connection with the second follower rod, and the inner end of the jacking screw is in contact connection with the grab bar.

The invention designs that the extension spring is arranged to be a column spring, one end head of the extension spring is arranged to be connected with the support body, and the other end head of the extension spring is arranged to be connected with a pin shaft positioned between the first connecting rod and the ladder frame.

The invention designs that a support body and a walking board are arranged to be distributed in a mode of covering an upper cover part, the support body, a ladder frame, a handrail rod, a first connecting rod, a second connecting rod, a first follower rod and a second follower rod are arranged to be distributed in a mode of swinging an outer connecting rod, the support body, the ladder frame, the handrail rod, the first connecting rod, the second connecting rod, the first follower rod, the second follower rod and a jacking screw rod are arranged to be distributed in a telescopic connection mode, the support body, the ladder frame, the handrail rod, the first connecting rod, the second connecting rod, the first follower rod, the second follower rod and a tension spring are arranged to be distributed in a mode of elastic energy storage and fastening, the first connecting rod, the second connecting rod, the first follower rod, the second follower rod, the handrail rod, the jacking screw rod and the tension spring are arranged to form a group of side swinging parts, and two groups of side swinging parts are respectively arranged on the upper cover part and the ladder frame and the handrail rod are arranged in a mode of adding ladders Between the ladder frame and the bracket body, the inner side surface part of the first side rod part and the inner side surface part of the second side rod part are respectively arranged to be in contact connection with the outer end of the resisting plate part, the first side rod part and the second side rod part are respectively arranged to be connected with the other end of the first strip plate part and the other end of the second strip plate part through pin shafts, one end of the first strip plate part and one end of the second strip plate part are respectively arranged to be connected with the U-shaped groove wall of the first upper frame part and the U-shaped groove wall of the second upper frame part through pin shafts,

the invention designs a using method of an expansion bracket device for an engineering vehicle, which comprises the following steps: the first lower frame part and the second lower frame part are connected with a frame of the engineering vehicle,

the first upper frame portion and the second upper frame portion are used for realizing connection with other upper components of the engineering vehicle and installation protection of functional components of the engineering vehicle.

The invention designs that the method comprises the following steps: connecting the vertical part of the first lower frame part and the vertical part of the second lower frame part with a frame of an engineering vehicle respectively, placing a battery box or a urea box on the lower end surfaces of the first upper frame part and the second upper frame part, connecting the battery box with the ear plate part and the first cross beam part through connecting bolts, connecting the urea box with the frame of the engineering vehicle through connecting bolts, swinging the second follower rod upwards to enable the transverse part of the second follower rod to be in a horizontal state and the vertical part of the second follower rod to be in a vertical state, enabling the first strip plate part and the second strip plate part to be in a horizontal state through the first follower rod, enabling the outer ends of the resisting strip part to act on the first strip part and the second strip part respectively, enabling the first strip part to be separated from the second upper frame part, enabling the second strip part to be separated from the first upper frame part, enabling the tension spring to be in an extension state, and enabling the tension spring to be in an extension state between the first strip part and the second, The second side rod part and the first upper frame part generate fastening tension, the rod part is drawn out of the second follower rod, the rod part and the second follower rod are connected together through a tightening screw rod, the first pedal rod part, the second pedal rod part and the walking board form a ladder support platform, the second follower rod and the rod part form a ladder grasping rod, the second follower rod is swung downwards to enable the transverse part of the second follower rod to be in a vertical state and the vertical part of the second follower rod to be in a horizontal state, the first board part and the second board part are in a vertical state through the first follower rod, the outer end of the resisting board part is separated from the first side rod part and the second side rod part, the first side rod part and the second upper frame part are folded, the second side rod part and the first upper frame part are folded, the tension spring is in an extension state, and fastening tension is generated between the first side rod part and the second upper frame part and between the second side rod part and the first upper frame part, and loosening the tightening screw rod, putting the rod part back into the second follower rod, and putting the first strip plate part, the second follower rod and the rod part into the U-shaped groove body of the first upper frame part and the U-shaped groove body of the second upper frame part respectively.

The invention designs an expansion bracket device for an engineering vehicle and application of an internal fixed battery box or a cover buckle on a urea box.

In this technical solution, the bracket body is a basic component and is also an essential technical feature of the present invention, and the first connecting rod, the second connecting rod, the ladder frame, the first follower rod, the second follower rod, the grab bar, the walking board, the tightening screw and the tension spring are functional components and are features for achieving other technical effects of the present invention.

In the technical scheme, the support body connected with other upper-mounted components of the engineering vehicle and used for protecting and mounting the functional components of the engineering vehicle is an important technical characteristic, and has novelty, creativity and practicability in the technical fields of the expansion support device for the engineering vehicle, the using method and the application thereof, and all terms in the technical scheme can be explained and understood by patent documents in the technical field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Figure 1 is a schematic view of the present invention,

figure 2 is a schematic structural view of the stent body 1 of the present invention,

figure 3 is a front view of figure 1,

fig. 4 is a schematic view showing the connection relationship of the first side rod portion 41, the first strip plate portion 21 and the resistance plate portion 23,

figure 5 is a schematic view of the closed state of the present invention,

figure 6 is a schematic view of the present invention installed with a battery box,

figure 7 is a schematic view of the installation of the invention with a urea tank,

the support comprises a support body-1, a first connecting rod-2, a second connecting rod-3, a ladder frame-4, a first follower rod-5, a second follower rod-6, a grab bar-7, a deck-board-8, a tightening screw-9, a tension spring-10, a first upper frame-11, a second upper frame-12, a first lower frame-13, a second lower frame-14, a first cross beam-15, a second cross beam-16, a third cross beam-17, an ear plate-18, a tilting body-131, a straight bar-132, a first bar-21, a second bar-22, a resisting plate-23, a first edge-41, a second side rod-42, a first pedal rod-43, a second pedal rod-44, a rod-71, a rod part-71, a first lower frame-14, a first cross beam-15, a second cross beam-16, a third cross beam-17, an ear plate-, Hook-72.

Detailed Description

Terms such as "having," "including," and "comprising," as used with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof, in accordance with the examination guidelines.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other, and further, unless otherwise specified, the equipments and materials used in the following examples are commercially available, and if the processing conditions are not explicitly specified, please refer to the commercially available product specifications or follow the conventional method in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An expanding support device for engineering vehicles, fig. 1 is one of the first embodiments of the present invention, which is specifically described with reference to the accompanying drawings, and includes a support body 1, a first connecting rod 2, a second connecting rod 3, a ladder frame 4, a first follower rod 5, a second follower rod 6, a grab bar 7, a walking board 8, a tightening screw 9 and an extension spring 10, wherein the support body 1 is provided with the second follower rod 6 and the walking board 8, the first connecting rod 2, the second connecting rod 3 and the extension spring 10 are respectively arranged between the support body 1 and the ladder frame 4, the first follower rod 5 is arranged between the first connecting rod 2 and the second follower rod 6, the grab bar 7 is arranged in the second follower rod 6, and the tightening screw 9 is arranged between the second follower rod 6 and the grab bar 7.

In this embodiment, the bracket body 1 is configured to include a first upper frame portion 11, a second upper frame portion 12, a first lower frame portion 13, a second lower frame portion 14, a first beam portion 15, a second beam portion 16, a third beam portion 17 and a lug portion 18, and a transverse portion of the first lower frame portion 13 and a transverse portion of the second lower frame portion 14 are respectively configured to be coupled to the lug portion 18, a transverse end of the first upper frame portion 11 is configured to be coupled to a vertical end of the first lower frame portion 13, and a transverse end of the first lower frame portion 13 is configured to be coupled to a middle of a vertical portion of the first upper frame portion 11, a transverse end of the second upper frame portion 12 is configured to be coupled to a vertical end of the second lower frame portion 14, and a transverse end of the second lower frame portion 14 is configured to be coupled to a middle of a vertical portion of the second upper frame portion 12, ends of the first transverse beam portion 15 are respectively configured to be coupled to a vertical portion of the first upper frame portion 11 and the second upper frame portion 12, and a transverse end of the second transverse beam portion 16 and the third frame portion 14 Ends of the portion 17 are respectively provided to be coupled to a transverse portion of the first upper frame portion 11 and a transverse portion of the second upper frame portion 12, a vertical portion of the first upper frame portion 11 and a vertical portion of the second upper frame portion 12 are respectively provided to be coupled to the first link 2 and the second link 3 by a pin, a corner portion of the first upper frame portion 11 and a corner portion of the second upper frame portion 12 are respectively provided to be coupled to the second follower lever 6 by a pin, a transverse portion of the first lower frame portion 13 and a transverse portion of the second lower frame portion 14 are respectively provided to be coupled to the tension spring 10, an upper end surface portion of the second transverse beam portion 16 and an upper end surface portion of the third transverse beam portion 17 are respectively provided to be coupled to the floor plate 8, the ear plate portion 18 is provided to be coupled to the battery box, a vertical portion of the first lower frame portion 13 and a vertical portion of the second lower frame portion 14 are respectively provided to be coupled to a frame of the construction vehicle, the first upper frame portion, The second upper frame portion 12, the first lower frame portion 13, and the second lower frame portion 14 are respectively provided as L-shaped frame bodies and the cross section of the first upper frame portion 11, the cross section of the second upper frame portion 12, the cross section of the vertical portion of the first lower frame portion 13, and the cross section of the vertical portion of the second lower frame portion 14 are respectively provided as U-shaped, the U-shaped groove body of the first upper frame portion 11 and the U-shaped groove body of the second upper frame portion 12 are respectively provided to be coupled with the first link 2, the second link 3, the second follower lever 6, and the grab bar 7 and the U-shaped groove body of the first lower frame portion 13 is provided to be coupled with the first upper frame portion 11, the U-shaped groove body of the second lower frame portion 14 is provided to be coupled with the second upper frame portion 12, the first cross beam portion 15, the second cross beam portion 16, and the third cross beam portion 17 are respectively provided to be a bar-shaped body and the ear plate portion 18 is provided to be an L-shaped sheet-shaped body.

Through support body 1, formed to first connecting rod 2, second connecting rod 3, second follower rod 6, bar 7, walk platen 8 and extension spring 10's support connection point, by first upper ledge portion 11 and second upper ledge portion 12, realized being connected with first connecting rod 2, realized being connected with second connecting rod 3, realized being connected with second follower rod 6, realized being connected with bar 7, by second crossbeam portion 16 and third crossbeam portion 17, realized being connected with walking platen 8, by first lower frame portion 13 and second lower ledge portion 14, realized being connected with extension spring 10, by otic placode portion 18, realized being connected with the storage battery box, by first crossbeam portion 15, realized being connected between first upper ledge portion 11 and the second upper ledge portion 12, its technical aim at: the mounting component is used for mounting a top-mounted component of the engineering vehicle.

In this embodiment, the transverse rear end of the first lower frame portion 13 and the transverse rear end of the second lower frame portion 14 are provided as the straight bar 132, the transverse front end of the first lower frame portion 13 and the transverse front end of the second lower frame portion 14 are provided as the tilted body 131, an included angle between a center line of the tilted body 131 and a center line of the straight bar 132 is set to 18 to 24 °, and a ratio between a length of the tilted body 131 and a length of the straight bar 132 is set to 1:4.8 to 6.7.

By first lower frame portion 13 and second lower frame portion 14, realized being connected with extension spring 10, realized being connected with the battery box, its technical objective lies in: the battery box is used as a component for enabling the battery box to be close to a frame of the engineering vehicle.

In the present embodiment, the first link 2 and the second link 3 are respectively configured as a bar-shaped body and the first link 2 and the second link 3 are configured to include a first strip plate portion 21, a second strip plate portion 22 and a resisting plate portion 23, an upper end portion of an inner side surface of the first strip plate portion 21 is configured to be coupled with one side surface of the resisting plate portion 23 and an upper end portion of an inner side surface of the second strip plate portion 22 is configured to be coupled with the other side surface of the resisting plate portion 23, an end of the first strip plate portion 21 and an end of the second strip plate portion 22 are configured to be coupled with an end of the resisting plate portion 23 in a retracting manner and an outer end of the resisting plate portion 23 is configured to be coupled with the ladder frame 4, one end of the first strip plate portion 21 and one end of the second strip plate portion 22 are respectively configured to be coupled with the bracket body 1 by a pin and the other end of the first strip plate portion 21, the intermediate portion of the first strip portion 21 of the first link 2 and the intermediate portion of the second strip portion 22 of the first link 2 are respectively provided to be coupled to the first follower lever 5 by a pin shaft and the pin shafts between the first link 2 and the ladder frame 4 are respectively provided to be coupled to the tension springs 10.

Through first connecting rod 2 and second connecting rod 3, formed the support tie point to support body 1, ladder frame 4, first follower rod 5 and extension spring 10, by first slat portion 21 and second slat portion 22, realized being connected with support body 1, by resisting board 23, realized being connected with ladder frame 4, by first connecting rod 2, realized being connected with first follower rod 5, realized being connected with extension spring 10, its technical aim at: for use as a component of a four-bar linkage system with the support body 1 and the ladder rack 4.

In this embodiment, the ladder frame 4 is configured to include a first side rod portion 41, a second side rod portion 42, a first leg rod portion 43 and a second leg rod portion 44, and a lower end of the first side rod portion 41 and a lower end of the second side rod portion 42 are respectively configured to be coupled to an end of the second leg rod portion 44, an upper end of the first side rod portion 41 and an upper end of the second side rod portion 42 are respectively configured to be coupled to the first link 2 through a pin and an intermediate portion of the first side rod portion 41 and an intermediate portion of the second side rod portion 42 are respectively configured to be coupled to the second link 3 through a pin, an end of the first leg rod portion 43 is respectively configured to be coupled to an intermediate portion of the first side rod portion 41 and an intermediate portion of the second side rod portion 42 and a pin between the first link 2 and the first side rod portion 41, and a pin between the first link 2 and the second side rod portion 42 are respectively configured to be coupled to the extension spring 10, the first side, The second side rod portion 42, the first tread rod portion 43, and the second tread rod portion 44 are respectively configured as a strip-shaped body, and the first side rod portion 41, the second side rod portion 42, the first tread rod portion 43, and the second tread rod portion 44 are configured to be distributed in a groined shape.

Through ladder 4, formed the support connection point to first connecting rod 2 and second connecting rod 3, by first limit pole portion 41 and second limit pole portion 42, realized being connected with first connecting rod 2, realized being connected with second connecting rod 3, realized being connected with extension spring 10, by first pole portion 43 of stepping on and second pole portion 44 of stepping on, realized climbing the support component to operating personnel, its technical aim lies in: for use as part of a ladder.

In the present embodiment, the running plate 8 is provided as a rectangular sheet-like body having a pattern on an upper end surface portion thereof and the running plate 8 is provided to be coveringly coupled with the holder body 1.

Through walking platen 8, formed the support tie point to support body 1, by walking platen 8, realized being connected with support body 1, its technical aim at: for use as a means for an operator to stand on.

In this embodiment, the first follower lever 5 is provided as a bar-like body and one end of the first follower lever 5 is provided to be coupled with the first link 2 by a pin, and the other end of the first follower lever 5 is provided to be coupled with the second follower lever 6 by a pin.

Through first follower rod 5, formed the support tie point to first connecting rod 2 and second follower rod 6, by first follower rod 5, realized being connected with first connecting rod 2, realized being connected with second follower rod 6, its technical aim lies in: used as one of the components for driving the first connecting rod 2 to rotate on the bracket body 1.

In the present embodiment, the second follower lever 6 is provided as an L-shaped tubular body and the vertical portion of the second follower lever 6 is provided to be telescopically coupled with the grab bar 7, the lateral end of the second follower lever 6 is provided to be coupled with the first follower lever 5 by a pin and the corner portion of the second follower lever 6 is provided to be coupled with the bracket body 1 by a pin, and a rectangular hole body is provided in the vertical portion of the second follower lever 6.

Through second follower rod 6, formed the support tie point to support body 1, first follower rod 5 and bar 7, by second follower rod 6, realized being connected with support body 1, realized being connected with first follower rod 5, realized being connected with bar 7, its technical aim at: used as one of the components for driving the first connecting rod 2 to rotate on the bracket body 1.

In the present embodiment, the grab bar 7 is provided to include the rod portion 71 and the hook portion 72 and the upper end of the rod portion 71 is provided to be coupled with the hook portion 72, the rod portion 71 is provided to be plug-coupled with the second follower lever 6 and the side surface portion of the rod portion 71 is provided to be contact-coupled with the knock screw 9, the rod portion 71 is provided to be a rectangular rod-shaped body and the hook portion 72 is provided to be an L-shaped rod-shaped body, the end of the lateral portion of the hook portion 72 is provided to be coupled with the rod portion 71 and the end of the lateral portion of the hook portion 72 is.

Through bar 7, formed the support tie point to second follower rod 6 and the tight screw rod 9 in top, by pole portion 71 and hook portion 72, realized being connected with second follower rod 6, by pole portion 71, realized being connected with the tight screw rod 9 in top, its technical aim at: for use as a means for an operator to hold.

In the present embodiment, the tightening screw 9 is provided as a hexagonal screw and the tightening screw 9 is provided to be screw-coupled with the second follower lever 6, and the inner end of the tightening screw 9 is provided to be contact-coupled with the grab bar 7.

Through the tight screw rod 9 in top, formed the support tie point to second follower rod 6 and bar 7, by the tight screw rod 9 in top, realized being connected with second follower rod 6, realized being connected with bar 7, its technical aim at: for connecting the grab bar 7 and the second follower lever 6 together.

In this embodiment, the extension spring 10 is provided as a column spring and one end of the extension spring 10 is provided to be coupled with the bracket body 1 and the other end of the extension spring 10 is provided to be coupled with a pin between the first link 2 and the ladder frame 4.

Through extension spring 10, formed the support tie point to support body 1, first connecting rod 2 and ladder frame 4, by extension spring 10, realized being connected with support body 1, realized being connected with first connecting rod 2, realized being connected with ladder frame 4, its technical aim at: for elastically connecting the ladder frame 4 to the bracket body 1.

In the present embodiment, the support body 1 and the deck 8 are arranged to be distributed in the manner of an upper covering member and the support body 1 and the ladder frame 4 and the grab bar 7 are arranged to be distributed in the manner of an additional ladder stand, the support body 1, the ladder frame 4 and the grab bar 7 and the first connecting rod 2, the second connecting rod 3, the first follower rod 5 and the second follower rod 6 are arranged to be distributed in the manner of an outer swing connecting rod, the support body 1, the ladder frame 4, the grab bar 7, the first connecting rod 2, the second connecting rod 3, the first follower rod 5 and the second follower rod 6 and the tightening screw 9 are arranged to be distributed in the manner of a telescopic connection and the support body 1, the ladder frame 4, the grab bar 7, the first connecting rod 2, the second connecting rod 3, the first follower rod 5 and the second follower rod 6 and the tension spring 10 are arranged to be distributed in the manner of an elastic energy storage fastening, one first connecting rod 2, one second connecting rod 3, one second, A first follower rod 5, a second follower rod 6, a grab bar 7, a tightening screw 9 and a tension spring 10 are arranged to constitute a set of side swinging members and the two sets of side swinging members are respectively arranged between the ladder frame 4 and the bracket body 1, the inner side portions of the first side rod portion 41 and the second side rod portion 42 are respectively arranged to be coupled in contact with the outer end of the resisting plate portion 23, the first side rod portion 41 and the second side rod portion 42 are respectively arranged to be coupled with the other end of the first strip portion 21 and the other end of the second strip portion 22 by pins, one end of the first strip portion 21 and one end of the second strip portion 22 are respectively arranged to be coupled with the U-shaped groove wall of the first upper frame portion 11 and the U-shaped groove wall of the second upper frame portion 12 by pins,

in the second embodiment of the present invention, an included angle between the center line of the tilted body 131 and the center line of the straight bar 132 is set to 18 °, and a ratio between the length of the tilted body 131 and the length of the straight bar 132 is set to 1: 4.8.

In the third embodiment of the present invention, an included angle between the center line of the tilted body 131 and the center line of the straight body 132 is set to be 24 °, and a ratio between the length of the tilted body 131 and the length of the straight body 132 is set to be 1: 6.7.

Fourth, in the first embodiment of the present invention, an angle between a center line of the tilted body 131 and a center line of the straight body 132 is set to 21 ° and a ratio between a length of the tilted body 131 and a length of the straight body 132 is set to 1: 5.8.

In the second embodiment of the present invention, the technical features of the bracket body 1 are integrated in such a manner that the bracket body is connected to other upper-mounted components of the construction vehicle and functional components of the construction vehicle are mounted in a protective manner.

In the present embodiment, the inner connecting portion connected to the frame of the working vehicle is provided to include the first lower frame portion 13 and the second lower frame portion 14.

In the present embodiment, the outer connecting portion connected to the upper mounting member of the working vehicle and the mounting arch section are provided to include the first upper frame portion 11 and the second upper frame portion 12.

In the present embodiment, the bracket body 1 is configured to further include a first beam portion 15, a second beam portion 16, a third beam portion 17, and a lug plate portion 18.

In the present embodiment, a first attachment device is further included and is provided on the stand body 1, and the first attachment device is provided as the running board 8.

In this embodiment, a second attachment device is also included and arranged on the support body 1, the second attachment device being arranged to include the ladder frame 4 and the grab bar 7.

In this embodiment, a third attachment device is further included and is disposed between the second attachment device and the stand body 1, and the third attachment device is configured to include the first link 2, the second link 3, the first follower lever 5, and the second follower lever 6.

In this embodiment, a fourth attachment device is further included and is arranged between the second attachment device and the third attachment device, the fourth attachment device being arranged to tighten the screw 9.

In this embodiment, a fifth attachment device is further included and is disposed between the second and third attachment devices and the stand body 1, the fifth attachment device being provided as the tension spring 10.

A second embodiment of the invention is based on the first embodiment.

The invention is further described below with reference to the following examples, which are intended to illustrate the invention but not to limit it further.

A use method of an expansion bracket device for an engineering vehicle comprises the following steps: the vertical portion of the first lower frame portion 13 and the vertical portion of the second lower frame portion 14 are connected to the frame of the construction vehicle, the battery box or the urea box is placed on the lower end surfaces of the first upper frame portion 11 and the second upper frame portion 12, the battery box is connected to the lug plate portion 18 and the first cross member portion 15 by the connecting bolt, the urea box is connected to the frame of the construction vehicle by the connecting bolt, the second follower lever 6 is swung upward so that the lateral portion of the second follower lever 6 is in a horizontal state and the vertical portion of the second follower lever 6 is in a vertical state, the first follower lever 5 is used to set the first strip portion 21 and the second strip portion 22 in a horizontal state, the outer ends of the resistance plate portion 23 are respectively applied to the first side lever portion 41 and the second side lever portion 42, the first side lever portion 41 is separated from the second upper frame portion 12, the second side lever portion 42 is separated from the first upper frame portion 11, and the tension spring 10 is in an extended state, a fastening tension is generated between the first side rod portion 41 and the second upper frame portion 12, and between the second side rod portion 42 and the first upper frame portion 11, the lever portion 71 is pulled out from the second follower rod 6, the lever portion 71 is connected to the second follower rod 6 by the tightening screw 9, the first step rod portion 43, the second step rod portion 44 and the running board 8 form a ladder stand, the second follower rod 6 and the lever portion 71 form a ladder catch lever, the second follower rod 6 is swung down so that the lateral portion of the second follower rod 6 is in a vertical state and the vertical portion of the second follower rod 6 is in a horizontal state, the first follower rod 5 makes the first strip portion 21 and the second strip portion 22 in a vertical state, the outer end of the resistance plate portion 23 is separated from the first side rod portion 41 and the second side rod portion 42, the first side rod portion 41 is folded with the second upper frame portion 12, and the second side portion 42 is folded with the first upper frame portion 11, when the extension spring 10 is in an extended state, a tightening tension is generated between the first side rod portion 41 and the second upper frame portion 12, and between the second side rod portion 42 and the first upper frame portion 11, the tightening screw 9 is loosened, the rod portion 71 is retracted into the second follower rod 6, and the first strip portion 21, the second strip portion 22, the second follower rod 6, and the rod portion 71 are respectively inserted into the U-shaped groove of the first upper frame portion 11 and the U-shaped groove of the second upper frame portion 12.

The second embodiment of the present invention comprises the steps of: the first lower frame part 13 and the second lower frame part 14 are connected with the frame of the engineering vehicle,

the first upper frame portion 11 and the second upper frame portion 12 are connected to other upper components of the construction vehicle and protect functional components of the construction vehicle.

A second embodiment of the invention is based on the first embodiment,

an expansion bracket device for engineering vehicles and an application method of the expansion bracket device for fixing a battery box or a cover buckle in a urea box.

When the invention is verified, in the technical field of engineering vehicles, the technical problem of matching the performance of the upper device and the chassis exists, various performance requirements of the upper device are met, and the influence on the performance of the chassis is reduced at the same time, the performance of the upper device is met through the support body 1, and other upper devices can be butted, so that the occupied space is effectively reduced, and meanwhile, the wind resistance of the support body 1 consisting of the first upper frame part 11, the second upper frame part 12, the first lower frame part 13, the second lower frame part 14, the first cross beam part 15, the second cross beam part 16, the third cross beam part 17 and the lug plate part 18 is minimum, and the internal space is maximum.

The invention has the following characteristics:

1. due to the design of the support body 1, the support body 1 is connected with other upper parts of the engineering vehicle, and the functional parts of the engineering vehicle are protected and installed, so that the parts of the engineering vehicle are installed at the same time, and the part installation space of the engineering vehicle is optimized.

2. Due to the design of the first upper frame portion 11, the second upper frame portion 12, the first lower frame portion 13, the second lower frame portion 14, the first beam portion 15, the second beam portion 16, the third beam portion 17 and the ear plate portion 18, an arch-shaped mounting frame is formed.

3. Due to the design of the ladder frame 4 and the grab bar 7, a ladder stand is formed.

4. Due to the design of the first connecting rod 2, the second connecting rod 3, the first follower rod 5 and the second follower rod 6, a folding and unfolding intermediate system is formed.

5. Due to the design of the walking board 8, a cover board support is formed.

6. Due to the design of the jacking screw rod 9, telescopic connection is realized.

7. Due to the design of the extension spring 10, an elastic element intermediate connection is formed.

8. Because the structural shape is limited by the numerical range, the numerical range is the technical characteristic of the technical scheme of the invention, and is not the technical characteristic obtained by formula calculation or limited tests, and tests show that the technical characteristic of the numerical range achieves good technical effect.

9. Due to the design of the technical characteristics of the invention, tests show that each performance index of the invention is at least 1.7 times of the existing performance index under the action of the single and mutual combination of the technical characteristics, and the invention has good market value through evaluation.

Other technical features which are the same as or similar to those of the bracket body 1 for connecting other upper-mounted components of the engineering vehicle and protecting and mounting functional components of the engineering vehicle are one of the embodiments of the invention, and the technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to meet the requirements of patent laws, patent implementation rules and examination guidelines, all possible combinations of the technical features of the above-mentioned embodiments are not described again.

The above embodiment is only one implementation form of the expansion bracket device and the using method for the engineering vehicle and the application thereof provided by the invention, and other modifications of the scheme provided by the invention, the addition or reduction of the components or steps therein, or the application of the invention in other technical fields close to the invention, belong to the protection scope of the invention.

Claims (10)

1. An expansion bracket device for engineering vehicles is characterized in that: comprises an inner connecting part connected with a frame of the engineering vehicle, an outer connecting part connected with an upper mounting part of the engineering vehicle and a bracket body (1) with an installation arch-shaped section.

2. The extension bracket device for construction vehicles according to claim 1, wherein: the technical characteristics of the bracket body (1) are integrated according to the connection with other upper-mounted components of the engineering vehicle and the protection and installation mode of functional components of the engineering vehicle.

3. The extension bracket device for construction vehicles according to claim 1, wherein: the inner connecting part connected with the frame of the engineering vehicle is provided with a first lower frame part (13) and a second lower frame part (14),

or the outer connecting part connected with the upper assembly part of the engineering vehicle and the installation arched section are arranged to comprise a first upper frame part (11) and a second upper frame part (12),

or the bracket body (1) is arranged to further comprise a first beam part (15), a second beam part (16), a third beam part (17) and a lug plate part (18),

or, a first attachment device is also included and arranged on the bracket body (1), the first attachment device is arranged as a walking board (8),

or, a second attachment device is also included and arranged on the bracket body (1), the second attachment device is arranged to include a ladder rack (4) and a grab bar (7),

or a third accessory device is arranged between the second accessory device and the bracket body (1), the third accessory device is arranged to comprise a first connecting rod (2), a second connecting rod (3), a first follower rod (5) and a second follower rod (6),

or a fourth accessory device is also included and is arranged between the second accessory device and the third accessory device, the fourth accessory device is arranged to tightly push the screw rod (9),

or, a fifth accessory device is further included and arranged between the second accessory device and the third accessory device and the bracket body (1), and the fifth accessory device is arranged as an extension spring (10).

4. The extension bracket device for construction vehicles according to claim 3, wherein: the ladder support is characterized in that a second follower rod (6) and a walking board (8) are respectively arranged on the support body (1), a first connecting rod (2), a second connecting rod (3) and an extension spring (10) are respectively arranged between the support body (1) and the ladder frame (4), a first follower rod (5) is arranged between the first connecting rod (2) and the second follower rod (6), a grab rail (7) is arranged in the second follower rod (6), and a jacking screw rod (9) is arranged between the second follower rod (6) and the grab rail (7).

5. The extension bracket device for construction vehicles according to claim 4, wherein: the transverse portion of the first lower frame portion (13) and the transverse portion of the second lower frame portion (14) are respectively provided to be coupled with the lug portions (18), the transverse end of the first upper frame portion (11) is provided to be coupled with the vertical end of the first lower frame portion (13) and the transverse end of the first lower frame portion (13) is provided to be coupled with the middle of the vertical portion of the first upper frame portion (11), the transverse end of the second upper frame portion (12) is provided to be coupled with the vertical end of the second lower frame portion (14) and the transverse end of the second lower frame portion (14) is provided to be coupled with the middle of the vertical portion of the second upper frame portion (12), the end of the first transverse beam portion (15) is provided to be coupled with the vertical portion of the first upper frame portion (11) and the vertical portion of the second upper frame portion (12) and the end of the second transverse beam portion (16) and the end of the third transverse beam portion (17) are provided to be coupled with the upper transverse portion of the first upper frame portion (11) and the transverse portion of the second upper frame portion (12), the vertical portion of the first upper frame portion (11) and the vertical portion of the second upper frame portion (12) are respectively connected with the first connecting rod (2) and the second connecting rod (3) through pin shafts, the corner portion of the first upper frame portion (11) and the corner portion of the second upper frame portion (12) are respectively connected with the second follower rod (6) through pin shafts, the transverse portion of the first lower frame portion (13) and the transverse portion of the second lower frame portion (14) are respectively connected with the extension spring (10), the upper end face portion of the second transverse beam portion (16) and the upper end face portion of the third transverse beam portion (17) are respectively connected with the walking board (8), the lug plate portion (18) is connected with the battery box, the vertical portion of the first lower frame portion (13) and the vertical portion of the second lower frame portion (14) are respectively connected with a frame of the engineering vehicle, the first upper frame portion (11), the second upper frame portion (12) and the second upper frame portion (12) are respectively connected with the frame of the engineering vehicle, The first lower frame portion (13) and the second lower frame portion (14) are respectively set to L-shaped frame bodies and the cross section of the first upper frame portion (11), the cross section of the second upper frame portion (12), the cross section of the vertical portion of the first lower frame portion (13) and the cross section of the vertical portion of the second lower frame portion (14) are respectively set to U-shaped, the U-shaped groove body of the first upper frame portion (11) and the U-shaped groove body of the second upper frame portion (12) are respectively set to be connected with the first connecting rod (2), the second connecting rod (3), the second follower rod (6) and the grab bar (7), and the U-shaped groove body of the first lower frame portion (13) is set to be connected with the first upper frame portion (11), the U-shaped groove body of the second lower frame portion (14) is set to be connected with the second upper frame portion (12), the first beam portion (15), the second beam portion (16) and the third beam portion (17) are respectively set to bar bodies and the lug portions (18) are set to L-shaped,

or the transverse rear end of the first lower frame portion (13) and the transverse rear end of the second lower frame portion (14) are arranged to be straight bodies (132), the transverse front end of the first lower frame portion (13) and the transverse front end of the second lower frame portion (14) are arranged to be tilting bodies (131), the included angle between the central line of the tilting bodies (131) and the central line of the straight bodies (132) is set to be 18-24 degrees, and the ratio between the length of the tilting bodies (131) and the length of the straight bodies (132) is set to be 1: 4.8-6.7.

6. The extension bracket device for construction vehicles according to claim 4, wherein: the first connecting rod (2) and the second connecting rod (3) are respectively arranged to be strip-shaped bodies, the first connecting rod (2) and the second connecting rod (3) are arranged to comprise a first strip plate part (21), a second strip plate part (22) and a resisting plate part (23), the upper end part of the inner side surface of the first strip plate part (21) is connected with one side surface of the resisting plate part (23) in a coupling mode, the upper end part of the inner side surface of the second strip plate part (22) is connected with the other side surface of the resisting plate part (23) in a coupling mode, the end head of the first strip plate part (21) and the end head of the second strip plate part (22) are connected with the end head of the resisting plate part (23) in a retraction mode, the outer end head of the resisting plate part (23) is connected with the ladder frame (4), the one end head of the first strip plate part (21) and the end head of the second strip plate part (22) are respectively arranged to be connected with the bracket body The other end of the part (22) is connected with the ladder frame (4) through a pin shaft, the middle part of the first strip plate part (21) of the first connecting rod (2) and the middle part of the second strip plate part (22) of the first connecting rod (2) are respectively connected with the first follower rod (5) through pin shafts, and the pin shafts positioned between the first connecting rod (2) and the ladder frame (4) are respectively connected with the extension spring (10),

or, ladder frame (4) sets up to including first limit pole portion (41), second limit pole portion (42), first pole portion (43) and second are stepped on pole portion (44) and the lower end of the lower tip of first limit pole portion (41) and second limit pole portion (42) sets up respectively to the end hookup of stepping on pole portion (44) with the second, the last end of first limit pole portion (41) and the last end of second limit pole portion (42) set up respectively to hookup through round pin axle and first connecting rod (2) and the intermediate part of first limit pole portion (41) and the intermediate part of second limit pole portion (42) set up respectively to hookup through round pin axle and second connecting rod (3), the end of first pole portion (43) sets up respectively to the intermediate part of pole portion (41) and the intermediate part of second limit pole portion (42) and lies in the round pin axle between first connecting rod (2) and first limit pole portion (41), the round pin axle that lies in between first connecting rod (2) and second limit pole portion (42) sets up respectively to and extension spring (10) The first side rod part (41), the second side rod part (42), the first pedal rod part (43) and the second pedal rod part (44) are respectively arranged into a strip-shaped body, the first side rod part (41), the second side rod part (42), the first pedal rod part (43) and the second pedal rod part (44) are arranged into a # -shaped distribution,

or the walking board (8) is a rectangular sheet body with patterns on the upper end surface part and the walking board (8) is connected with the bracket body (1) in a covering way,

or the first follower rod (5) is arranged into a strip-shaped body, one end of the first follower rod (5) is arranged to be connected with the first connecting rod (2) through a pin shaft, the other end of the first follower rod (5) is arranged to be connected with the second follower rod (6) through a pin shaft,

or the second follower rod (6) is arranged into an L-shaped tubular body, the vertical part of the second follower rod (6) is arranged to be telescopically connected with the grab bar (7), the transverse end of the second follower rod (6) is arranged to be connected with the first follower rod (5) through a pin shaft, the corner part of the second follower rod (6) is arranged to be connected with the bracket body (1) through a pin shaft, a rectangular hole body is arranged in the vertical part of the second follower rod (6),

or, grab bar (7) sets up to include pole portion (71) and hook portion (72) and the upper end of pole portion (71) sets up to coupleing with hook portion (72), pole portion (71) sets up to coupleing with second follower rod (6) plug-in type and the side face of pole portion (71) sets up to coupleing with top tight screw rod (9) contact, pole portion (71) sets up to rectangular rod-shaped body and hook portion (72) set up to L font rod-shaped body, the horizontal portion end of hook portion (72) sets up to coupleing with pole portion (71) and the horizontal portion lower extreme end face of hook portion (72) sets up to coupleing with second follower rod (6) contact,

or the tightening screw (9) is a hexagonal screw, the tightening screw (9) is in threaded connection with the second follower rod (6), the inner end of the tightening screw (9) is in contact connection with the grab bar (7),

or the extension spring (10) is a column spring, one end of the extension spring (10) is connected with the support body (1), and the other end of the extension spring (10) is connected with a pin shaft between the first connecting rod (2) and the ladder rack (4).

7. The expansion bracket device for work vehicles according to any one of claims 1 to 6, wherein: the support body (1) and the walking board (8) are arranged to be distributed according to the mode of an upper covering part, the support body (1), the ladder frame (4), the grab bar (7), the first connecting rod (2), the second connecting rod (3), the first follow-up rod (5) and the second follow-up rod (6) are arranged to be distributed according to the mode of an additional ladder stand, the support body (1), the ladder frame (4), the grab bar (7), the first connecting rod (2), the second connecting rod (3), the first follow-up rod (5) and the second follow-up rod (6) and the jacking screw rod (9) are arranged to be distributed according to the mode of telescopic connection, the support body (1), the ladder frame (4), the grab bar (7), the first connecting rod (2), the second connecting rod (3), the first follow-up rod (5) and the second follow-up rod (6) and the stretching spring (10) are arranged to be distributed according to the mode of elastic energy storage fastening The cloth comprises a first connecting rod (2), a second connecting rod (3), a first follower rod (5), a second follower rod (6), a grab bar (7), a tightening screw rod (9) and a tension spring (10) which are arranged to form a group of side swinging components, wherein the two groups of side swinging components are respectively arranged between a ladder frame (4) and a bracket body (1), the inner side surface part of a first side rod part (41) and the inner side surface part of a second side rod part (42) are respectively arranged to be in contact connection with the outer end of a resisting plate part (23), the first side rod part (41) and the second side rod part (42) are respectively arranged to be in connection with the other end of the first strip plate part (21) and the other end of the second strip part (22) through pin shafts, and one end of the first strip plate part (21) and one end of the second strip plate part (22) are respectively arranged to be in connection with the U-shaped groove wall of the first upper edge frame part (11) and the second upper edge groove through pin shafts The U-shaped groove walls of the frame part (12) are connected.

8. A use method of an expansion bracket device for an engineering vehicle is characterized by comprising the following steps: the method comprises the following steps: the first lower frame part (13) and the second lower frame part (14) are connected with a frame of the engineering vehicle,

the first upper frame part (11) and the second upper frame part (12) are used for realizing connection with other upper-mounted components of the engineering vehicle and installation and protection of functional components of the engineering vehicle.

9. The use method of the expansion bracket device for the engineering vehicle as claimed in claim 4, wherein: the method comprises the following steps: the vertical part of a first lower frame part (13) and the vertical part of a second lower frame part (14) are respectively connected with a frame of a construction vehicle, a battery box or a urea box is placed on the lower end surfaces of the first upper frame part (11) and the second upper frame part (12), the battery box is connected with a lug plate part (18) and a first cross beam part (15) through connecting bolts, the urea box is connected with the frame of the construction vehicle through connecting bolts, a second follower rod (6) is swung upwards, the cross part of the second follower rod (6) is in a horizontal state, the vertical part of the second follower rod (6) is in a vertical state, a first plate part (21) and a second plate part (22) are in a horizontal state through a first follower rod (5), the outer end of a resisting plate part (23) respectively acts on the first side rod part (41) and the second side rod part (42), and the first side rod part (41) and the second upper frame part (12) are separated from each other, The second side rod part (42) is separated from the first upper frame part (11), the extension spring (10) is in an extension state, fastening tension is generated between the first side rod part (41) and the second upper frame part (12) and between the second side rod part (42) and the first upper frame part (11), the rod part (71) is drawn out from the second follower rod (6), the rod part (71) is connected with the second follower rod (6) through a tightening screw rod (9), the first pedal rod part (43), the second pedal rod part (44) and the walking board (8) form a ladder climbing support platform, the second follower rod (6) and the rod part (71) form a ladder climbing grab handle rod, the second follower rod (6) is swung downwards, the transverse part of the second follower rod (6) is in a vertical state, the vertical part of the second follower rod (6) is in a horizontal state, and the first strip plate part (21) and the second strip plate part (22) are in a vertical state through the first follower rod (5), the outer end of the resisting plate part (23) is separated from the first side rod part (41) and the second side rod part (42), the first side rod part (41) is folded with the second upper frame part (12), the second side rod part (42) is folded with the first upper frame part (11), the tension spring (10) is in an extending state, fastening tension is generated between the first side rod part (41) and the second upper frame part (12) and between the second side rod part (42) and the first upper frame part (11), the tightening screw rod (9) is loosened, the rod part (71) is placed back into the second follower rod (6), and the first strip part (21), the second strip part (22), the second follower rod (6) and the rod part (71) are respectively placed into a U-shaped groove body of the first upper frame part (11) and a U-shaped groove body of the second upper frame part (12).

10. An expansion bracket device for engineering vehicles and an application method of the expansion bracket device for fixing a battery box or a cover buckle in a urea box.

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